What is needed now is not strongly worded condemnation of Foley’s murder, much less a hashtag campaign. What is needed is a politico-military strategy to annihilate ISIS rather than simply chip around the edges of its burgeoning empire. In the Spectator of London I recently outlined what such a strategy should look like. In brief, it will require a commitment of some 10,000 U.S. advisors and Special Operators, along with enhanced air power, to work with moderate elements in both Iraq and Syria–meaning not only the peshmerga but also the Sunni tribes, elements of the Iraqi Security Forces, and the Free Syrian Army–to stage a major offensive to rout ISIS out of its newly conquered strongholds. The fact that Nouri al-Maliki is leaving power in Baghdad clears away a major obstacle to such a campaign.